Albert anderson



(No Model.)

A. ANDERSON.

THIRD RAIL INSULATOR. No. 595,089. Patented 1190.7,1897.

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UNITE STATEs ATENT FFICEQ.

ALBERT ANDERSON, OF BOSTON, lllASSAOHUSET'lS, ASSIGNOR OF ONE-HALF TO JOHAN M. ANDERSEN, OF SAME PLACE.

THIRD RAll.

SPECIFICATION forming part of Letters Patent No. 595,089, dated December 7, 1897.

Application filed J ly 23,1897.

To all whom it may concern:

Be it known that I, ALBERT ANDERSON, residing in Boston, in the county of Suffolk and State ofMassachusetts, have invented an Improvement in Third-Rail Insulators, of which the following description, in connection with the accompanying drawings, is a specification, like letters on the drawings representing like parts.

This invention relates to an insulating-support for electric conductors, and more especially to an insulating-support for the conductor of that class of electric-railway systems commonly known as the third-rail system.

My present invention has for its object to provide a simple and eflicient insulatingsupport for the purpose specified, and I accomplish my object by the construction shown, and which will be hereinafter described and claimed.

Figure 1 represents in elevation an insulatingsupport embodying this invention; Fig. 2, a vertical longitudinal section of the insulating-support shown in Fig. 1, and Fig. 3 a top or plan View of theinsulating-support shown in Fig. 1.

The insulating-support herein shown is provided with a hollow metallic base a, from the bottom of which extends an annular flange a, having holes a for the reception of spikes or other suitable fastening devices by which the insulating-support is firmly fastened to the railway-ties or other suitable foundation.

The hollow base a is provided with a thickened or reinforced top a provided with a threaded opening, into which is screwed the threaded end a of a metal standard or bolt a provided at its lower end with an annular flange a, constituting a shoulder to rest upon the top of the said base.

The bolt a is provided at its upper end with a head M, which is enveloped by a covering a of insulating material molded upon the head and shank of said bolt.

The in sulating-coverin g a is provided with one or more longitudinal or vertical ribs a herein shown as two in number, (see 3,) and located substantially diametrically opposite, and which enter longitudinal recesses, slots, or grooves a on the inner side of a Serial No. 64%,640. (No model.)

metal hood a adapted to be fitted upon the insulating-covering a as shown, and which is provided with a skirt a extended outwardly from the bottom of the metal hood.

The metallic hood a is locked to the insulated bolt against rotary movement, as herein shown by means of the longitudinal ribs a and the grooves (4 and the said metallic hood may and preferably will be also looked on the insulated bolt against longitudinal movement, preferably by means of lugs or ears a, which normally extend from the under side of the hood in a substantially straight line, (see dotted lines, Fig. 2,) to permit the hood to be fitted onto the insulated head of the bolt, but which are adapted to be bent inwardly, as represented in Fig. 2 by full lines, to engage the underside of the insulation covering the head of the bolt. The metallic hood a may and preferably will also be secured onto the insulated bolt by means of a layer of preferably insulating material, which may be poured or pressed into the hood with the latter inverted, so as to fill the space between the insulation covering the head of the bolt and the metal hood, which layer of material is represented in Fig. 2 by the heavy black line (L20.

The metal hood a is designed to support So the electric conductor, commonly known as the third rail, which is not herein shown, but which may be secured to the hood (0 by means of a bent lug or ear c0 integral with the hood, and a removable bolt 60 having a 8 5 bent finger a and extended through an opening in an offset or car (L25 on the said metal hood. The bolt c4 may be secured in its operative position (shown in Fig. 2) by means of a nut a and a washer (L27.

1 claim- 1. In an insulating-support, the combina= tion with a metallic hood provided with 1ongitudinal sockets on its inner side, of a metal bolt having its head and shank enveloped by 5 a covering of insulating material, longitudinal ribs on the insulated head engaging the longitudinal sockets in said hood, and a base to which said bolt is secured, substantially as described.

2. In an insulating-support, the con1bination with a metallic hood provided with a skirt and with normally straight locking-lugs depending from its under side, of a metal bolt having its head and shank enveloped by a covering of insulating material, longitudinal ribs on the insulated head engaging longitudinal sockets in the hood, and a base to which said bolt is secured, substantially as described.

3. In an insulating-support, the combina tion with the metal base a provided with a threaded opening in its top, a bolt comprising a head and shank having a flange or collar to rest on the top of the base a, and with a threaded end to engage the threaded opening in the said top, a covering of insulating material enveloping said shank and head and provided with longitudinal ribs a, a metal hood having longitudinal grooves into which the said ribs extend when the insulated head is inserted into said hood,-lugs or cars on the under side of the hood adapted to engage the underside of the insulation covering the head of said bolt, and means to secure the conductor to the metal hood, substantially as described.

l. 111 an insulating-support, the combination with the metal base a, a bolt secured thereto and provided with a covering of insulating material enveloping the head and shank of said bolt, a metal hood fitted over the insulation enveloping the head of the bolt and provided with a lug or ear (L21 at one side, and with an offset or car (L25 at the other side having an opening for the reception of a bolt provided with a bent finger, and means to lock said hood and insulated bolt together against rotary and longitudinal movement, substantially as described.

In testimony whereof I have signed my name to this specification in the presence of two subscribing Witnesses.

ALBERT ANDERSON.

Vitnesses:

JAS. II. CnUnonILL, .l. MURPHY. 

